<style> 
.div1{ 
    width: 500px;
    height: 100px;
    position: absolute;
    text-align: center;
    left:45%;
    top: 50%;
    margin-left: -50px; 
    margin-top: -50px;
    font-size: 24px;
 }
</style> 
<div class="content-wrapper">
	<div class="div1">
		欢迎登录小天蝎微信公众号管理平台
	</div>
</div>
